"We have forwarded to CBI all complaints between 1993 and 2009. CBI is taking action....Strict action would be initiated against all those who have indulged in wrongdoings and have given wrong statements," Jaiswal told a television channel.

CBI has booked Rao and Jindal for alleged cheating, graft and criminal misconduct in its 12th FIR in the coal blocks allocation scam, causing embarrassment to the ruling Congress.

During its eight-month long probe into the scam, it is for the first time that the then Minister of State for Coal has been named as accused in an FIR by CBI in which it has alleged that Rao received Rs 2.25 crore camouflaged as investment from one of Jindal's firm within a year of allocating him a coal block.